Methods: The models of 3-dimensional finite element analysis (3-D FEA) of left upper permanent central incisor were designed by microtomy.Comparative studies of stress distribution were carried out.

• 方法： 采用切片法建立上颌左侧恒中切牙的三维有限元模型，研究3种瓷贴面复合体的应力分布。